Recent Commits to lark:master

Merge pull request #1603 from sarathfrancis90/fix/declare-rule-name-crash

Raise GrammarError for non-terminal names in %declare

Raise GrammarError for non-terminal names in %declare

%declare is for terminals, but the grammar accepted any symbol, so a
lowercase (rule) name like `%declare foo` defined an abstract rule with
no tree. The compiler later called iter_subtrees() on that missing tree
and crashed with `AttributeError: 'NoneType' object has no attribute
'iter_subtrees'` instead of reporting the bad grammar.

Reject non-terminal names in %declare with a clear GrammarError.